A possible null value may not be used for a type marked with

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

Possible null reference argument for parameter 'filter' in 'FileSystemWatcher.FileSystemWatcher(string path, string filter)'.

Possible null reference argument for parameter 'filter' in 'FileSystemWatcher.FileSystemWatcher(string path, string filter)'.

The type 'NotNullAttribute' in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs' conflicts with the imported type 'NotNullAttribute' in 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Using the type defined in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs'.

The type 'DisallowNullAttribute' in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs' conflicts with the imported type 'DisallowNullAttribute' in 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Using the type defined in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs'.

The type 'DisallowNullAttribute' in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs' conflicts with the imported type 'DisallowNullAttribute' in 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Using the type defined in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs'.

The type 'DisallowNullAttribute' in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs' conflicts with the imported type 'DisallowNullAttribute' in 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Using the type defined in 'C:\Users\runneradmin\.nuget\packages\walterlv.nullableattributes.source\5.7.1\build\..\src\CodeAnalysis.cs'.